Here’s a step-by-step guide to clearing up a green pool using the PoolRx product. If you prefer an alternative algaecide, such as Sodium Bromide, Yellow Out, or Swamp Treat, simply replace PoolRx with your chosen product in Step 6 while following the remaining steps as outlined.

Step 1: Clean the Pool Filter

Begin by thoroughly cleaning your pool filter, as it’s likely clogged with green algae:

• D.E. Filters: Check for torn grids or a cracked top manifold and clean as needed.

• Cartridge Filters: Rinse off the cartridges.

• Sand Filters: Backwash the filter to reduce pressure.
  Depending on how severe the algae is, you may need to clean the filter multiple times throughout the process.

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Step 2: Brush the Pool

Aggressively brush the walls and floor to loosen algae, making it easier to eliminate. At this stage, focus on brushing rather than vacuuming. If there’s significant debris, skim it out.

 

Step 3: Check Water Chemistry

Test your pool’s water chemistry. Chlorine levels will likely be at zero, contributing to the algae growth. If the conditioner (CYA) level is high, focus on addressing chlorine levels first before worrying about CYA.

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Step 4: Balance the pH

For best results with PoolRx, adjust the pH to a range of 7.2–7.4. Use muriatic acid to lower the pH if necessary.

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Step 5: Raise Chlorine Levels

Bring the chlorine level up to 10.0 ppm, even though PoolRx suggests a minimum of 2.0 ppm. In my experience, starting with a higher chlorine level ensures effectiveness, especially for severe algae problems.

The amount of chlorine required depends on the severity of the algae:

• Light green (Level 2): Add ~2 gallons of 12.5% liquid chlorine for a 20,000-gallon pool.

• Severe (Level 4): Add ~8 gallons of 12.5% liquid chlorine for the same pool size.

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Step 6: Add the PoolRx Unit

Insert a PoolRx unit into the pump basket. Choose the correct size based on pool capacity and algae severity:

• Black Unit (12 oz minerals): Best for pools up to 30,000 gallons or heavily infested pools.

• Blue Unit (8 oz minerals): Suitable for lightly green pools up to 20,000 gallons.

 

Step 7: Run the Pool for 24 Hours

Run the pool continuously for 24 hours to:

• Allow the filter to capture as much algae as possible.

• Fully dissolve PoolRx minerals into the water.

Be prepared to clean the filter multiple times during this step to maintain circulation.

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Step 8: Recheck Water Chemistry

After 24 hours, test the chlorine levels. It’s common for chlorine to drop to zero again, even after adding 8–10 gallons initially. Replenish chlorine to shock levels (10.0 ppm) as needed.

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Step 9: Vacuum the Pool

Once dead algae have settled at the bottom, vacuum the pool:

• Multi-Port Valve (Sand or D.E. Filters): Use the “Waste” setting to bypass the filter.

• Cartridge Filters or No Waste Setting: Vacuum debris into the filter, then clean or backwash it afterward.

For persistent issues, consider using a portable cleanup pump or filtration system.

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Step 10: Clean the Filter Again

Clean the filter as needed to maintain circulation. For severe cases, you may need to clean it 2–5 times. Monitor filter pressure (PSI) daily and clean when pressure rises or circulation slows.

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Conclusion

This guide provides a clear, systematic approach to transforming a green pool back into a sparkling oasis. Whether you’re a pool owner or service tech, following these steps will save time and effort while ensuring optimal results!